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Enable tuning of the PCI Express MPS (Maximum Payload Size) of
each device. The Maximum Read Request Size is not altered.
The SAFE method uses the largest MPS value supported by all devices in the
system for each device. This method is the same algorithm as used by Linux
pci=pcie_bus_safe.
The PEER2PEER method sets all devices to the minimal (128 byte) MPS, which
allows hot plug of devices later that might only support the minimum size,
and ensures compatibility of DMA between two devices on the bus.
Signed-off-by: Stephen Carlson <stcarlso@linux.microsoft.com>
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pci_find_first_device description says it can be used for iteration with
itself but it should really be with pci_find_next_device
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
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Add a mask parameter to control the lookup of the PCI region from which
the mapping can be made.
Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Add mask parameter and reorder length parameter to match the other PCI
address conversion functions. Using PCI_REGION_TYPE as the mask gives
the old behaviour.
It's converted from a macro to an inline function as the length
parameter is now used twice, but should only be calculated once.
Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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When converting addresses, apply a mask to the region flags during
lookup. This allows the caller to specify which flags are important and
which are not, for example to exclude system memory regions.
The behaviour of the function is changed such that they don't
preferentially search for a non-system memory region. However, system
memory regions are added after other regions in decode_regions() leading
to a similar outcome.
Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Evolve dm_pci_map_bar() to include an offset and length parameter. These
allow a portion of the memory to be mapped and range checks to be
applied.
Passing both the offset and length as zero results in the previous
behaviour and this is used to migrate the previous callers.
Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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When converting between PCI bus and physical addresses, include a length
parameter that can be used to check that the entire range fits within
one of the PCI regions. This prevents an address being returned that
might be only partially valid for the range it is going to be used for.
Where the range check is not wanted, passing a length of 0 will have the
same behaviour as before this change.
Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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The flags parameter of dm_pci_map_bar() is used for PCI region flags
rather than memory mapping flags. Fix the type to match that of the
region flags and stop using the regions flags as memory mapping flags.
Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Macros PCI_CLASS_CODE_* and PCI_CLASS_SUB_CODE_* are unused and are
duplication of PCI_CLASS_* macros defined in pci_ids.h header file.
So remove them.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
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PCI config space of the aardvark PCIe Root Port is available only in
internal aardvark memory space starting at offset 0x0. PCI Express
registers (PCI_EXP_*) start at offset 0xc0. And Advanced Error Reporting
registers (PCI_ERR_*) start at offset 0x100.
Replace custom aardvark register macros by standard PCI macros from
include/pci.h file with fixed offset.
Some DEVCTL and AER macros are not defined in include/pci.h file, so define
them in the same way as in linux uapi header file pci_regs.h.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
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Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
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Attempt to handle cases with a downstream port of a PCIe switch where
link training never completes and the link continues switching between
speeds indefinitely with the data link layer never reaching the active
state.
It has been observed with a downstream port of the ASMedia ASM2824 Gen 3
switch wired to the upstream port of the Pericom PI7C9X2G304 Gen 2
switch, using a Delock Riser Card PCI Express x1 > 2 x PCIe x1 device,
P/N 41433, wired to a SiFive HiFive Unmatched board. In this setup the
switches are supposed to negotiate the link speed of preferably 5.0GT/s,
falling back to 2.5GT/s.
However the link continues oscillating between the two speeds, at the
rate of 34-35 times per second, with link training reported repeatedly
active ~84% of the time, e.g.:
02:03.0 PCI bridge [0604]: ASMedia Technology Inc. ASM2824 PCIe Gen3 Packet Switch [1b21:2824] (rev 01) (prog-if 00 [Normal decode])
[...]
Bus: primary=02, secondary=05, subordinate=05, sec-latency=0
[...]
Capabilities: [80] Express (v2) Downstream Port (Slot+), MSI 00
[...]
LnkSta: Speed 5GT/s (downgraded), Width x1 (ok)
TrErr- Train+ SlotClk+ DLActive- BWMgmt+ ABWMgmt-
[...]
LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis+, Selectable De-emphasis: -3.5dB
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
[...]
Forcibly limiting the target link speed to 2.5GT/s with the upstream
ASM2824 device makes the two switches communicate correctly however:
02:03.0 PCI bridge [0604]: ASMedia Technology Inc. ASM2824 PCIe Gen3 Packet Switch [1b21:2824] (rev 01) (prog-if 00 [Normal decode])
[...]
Bus: primary=02, secondary=05, subordinate=09, sec-latency=0
[...]
Capabilities: [80] Express (v2) Downstream Port (Slot+), MSI 00
[...]
LnkSta: Speed 2.5GT/s (downgraded), Width x1 (ok)
TrErr- Train- SlotClk+ DLActive+ BWMgmt- ABWMgmt-
[...]
LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis+, Selectable De-emphasis: -3.5dB
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
[...]
and then:
05:00.0 PCI bridge [0604]: Pericom Semiconductor PI7C9X2G304 EL/SL PCIe2 3-Port/4-Lane Packet Switch [12d8:2304] (rev 05) (prog-if 00 [Normal decode])
[...]
Bus: primary=05, secondary=06, subordinate=09, sec-latency=0
[...]
Capabilities: [c0] Express (v2) Upstream Port, MSI 00
[...]
LnkSta: Speed 2.5GT/s (downgraded), Width x1 (downgraded)
TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
[...]
LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
[...]
Make use of this observation then and attempt to detect the inability to
negotiate the link speed automatically, and then handle it by hand. Use
the Data Link Layer Link Active status flag as the primary indicator of
successful link speed negotiation, but given that the flag is optional
by hardware to implement (the ASM2824 does have it though), resort to
checking for the mandatory Link Bandwidth Management Status flag showing
that the link speed or width has been changed in an attempt to correct
unreliable link operation (the ASM2824 does set it too).
If these checks indicate that link may not operate correctly, then poll
the Data Link Layer Link Active status flag along with the Link Training
flag for the duration of 200ms to see if the link has stabilised, that
is either that the Data Link Layer Link Active status flag has been set
or that Link Training has been inactive during at least the second half
of the interval.
If that has indicated failure, restrict the target speed to 2.5GT/s,
request a link retrain and check again if the link has stabilised. If
that does not work either, then restore the original speed setting and
claim defeat, otherwise we are done.
NB interestingly enough with the ASM2824 vs PI7C9X2G304 configuration
referred above asking the ASM2824 to retrain with a higher target link
speed once the 2.5GT/s speed has been negotiated makes the two devices
successfully negotiate 5.0GT/s. Lifting the 2.5GT/s speed restriction
would however prevent our workaround from working with an OS that issues
a reset and that is unaware of the problem. This is because the devices
would then try to negotiate a higher link speed from scratch and fail,
while the sticky property of the Target Link Speed setting will keep the
2.5GT/s speed restriction across a reset.
Keep the 2.5GT/s speed restriction then, conservatively, if functional
once applied.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Reviewed-by: Stefan Roese <sr@denx.de>
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Lot of PCI and PCIe controllers are using standard Config Address for PCI
Configuration Mechanism #1 or its extended version.
So add PCI_CONF1_ADDRESS() and PCI_CONF1_EXT_ADDRESS() macros into U-Boot's
pci.h header file which can be suitable for most PCI and PCIe controller
drivers. Drivers do not have to invent their own macros and can use these
new U-Boot macros.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
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Lot of PCIe controllers are using ECAM addressing. So add common ECAM
macros into U-Boot's pci.h header file which can be suitable for most
PCI controller drivers.
Replace custom ECAM address macros in every PCI controller driver by new
ECAM macros from U-Boot's pci.h header file.
Similar macros are defined also in Linux kernel. There is a small
difference between Linux and these new U-Boot macros.
U-Boot's PCIE_ECAM_OFFSET() takes device and function numbers in separate
arguments. Linux's PCIE_ECAM_OFFSET() takes device and function numbers
encoded in one argument. The reason is that U-Boot's PCI_DEVFN() macro is
different than Linux's PCI_SLOT() macro. So having device and function
numbers in separate arguments makes code more straightforward.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
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Now that PCI Bridge (PCIe Root Port) for Aardvark is emulated in U-Boot,
add support for handling and propagation of CRSSVE bit.
When CRSSVE bit is unset (default), driver has to reissue config
read/write request on CRS response.
CRSSVE bit is supported only when CRSVIS bit is provided in read-only
Root Capabilities register. So manually inject this CRSVIS bit into read
response for that register.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
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defined(CONFIG_DM_PCI_COMPAT)
The weak definition of pci_skip_dev from drivers/pci/pci_common.c is not
under CONFIG_DM_PCI_COMPAT, and that definition needs a previous
function prototype declaration to avoid W=1 build warnings.
That prototype is not available due to it being under CONFIG_DM_PCI_COMPAT,
so move it outside of that preprocessor block.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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This does not work with driver model so can be removed.
Signed-off-by: Simon Glass <sjg@chromium.org>
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We don't need this code anymore since when PCI is enabled, driver model is
always used.
Signed-off-by: Simon Glass <sjg@chromium.org>
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We don't need this check anymore since when PCI is enabled, driver model
is always used.
Drop it.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This prevents use of IS_ENABLED() in other files. Functions should be
visible in headers even if they are not available at link time.
Fix it.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present only bridge devices are bound before relocation, to save space
in pre-relocation memory. In some cases we do actually want to bind a
device, e.g. because it provides the console UART. Add a devicetree
binding to support this.
Use the PCI_VENDEV() macro to encode the cell value. This is present in
U-Boot but not used, so move it to the binding header-file.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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These functions don't modify the device-ID struct that is passed in, so
mark the argument as const, so the data structure can be declared that
way. This allows it to be placed in the rodata section.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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With the ventana boards migrated to DM_PCI and DM_ETH, we can remove
this prototype.
Cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
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Add a board_pci_fixup_dev weak function to allow PCI device fixups
during enumeration.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
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At present various drivers etc. access the device's 'seq' member directly.
This makes it harder to change the meaning of that member. Change access
to go through a function instead.
The drivers/i2c/lpc32xx_i2c.c file is left unchanged for now.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Try to maintain some consistency between these variables by using _plat as
a suffix for them.
Signed-off-by: Simon Glass <sjg@chromium.org>
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We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).
Rename some of the latter variables to end with 'plat' for consistency.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Add a few defines related to PCI ARI configuration.
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
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Makes dm_pci_map_bar API available to map BAR for Virtual function
PCI devices which support Enhanced Allocation.
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
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SR-IOV - Single Root I/O Virtualization
PF - Physical Function VF - Virtual Function
If SR-IOV capability is present, use it to initialize Virtual Function
PCI device instances. pci_sriov_init function will read SR-IOV
registers to create VF devices under the PF PCI device and also bind
driver if available. This function needs to be invoked from Physical
function device driver which expects VF device support, creating
minimal impact on existing framework.
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
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Instead of using a fixed length pre-allocated array of regions, this
patch moves to dynamically allocating the regions based on the number
of available regions plus the necessary regions for DRAM banks.
Since MAX_PCI_REGIONS is not needed any more, its removed completely
with this patch.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Marek Vasut <marek.vasut+renesas@gmail.com>
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Add api to get dma regions.
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
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Add PCI Express capability definitions required by the Broadcom
STB PCIe controller driver.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
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Some PCI Express register offsets are currently defined in multiple
drivers, move them to a common header to avoid re-definitions and
as a pre-requisite for adding new PCIe driver.
While at it replace some spaces with tabs.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
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Fix a typo in the comment.
Signed-off-by: Simon Glass <sjg@chromium.org>
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U-Boot's BDF format has its bits in the same position as the device tree
PCI definition.
Some x86 devices use linux format in their register format and it is
useful to be able to convert to U-Boot format. Add a macro for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Currently the size of pci_addr_t and pci_size_t depends on
CONFIG_SYS_PCI_64BIT. For qemu_arm64_defconfig with 4 GiB RAM this leads
to an error
pci_hose_phys_to_bus: invalid physical address
which is due to the truncation of the bus address in _dm_pci_phys_to_bus.
Defining CONFIG_SYS_PCI_64BIT is not a solution as this results in an error
PCI: Failed autoconfig bar 10
So let's use unsigned long for pci_addr_t and pci_size_t if
CONFIG_SYS_PCI_64BIT is not defined.
Considering that 32bit U-Boot is used to launch some 64bit x86 systems we
cannot do without CONFIG_SYS_PCI_64BIT requiring u64 as type.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
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Tidy up a few places where const * should be used.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present this method uses a non-const udevice pointer, but the call
should not modify the device. Use a const pointer.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Early in boot it is necessary to decode the PCI device/function values for
particular peripherals in the device tree or of-platdata. This is needed
in TPL where CONFIG_PCI is not defined.
To handle this, move pci_get_devfn() into a file that is built even when
CONFIG_PCI is not defined.
Also add a function for use by of-platdata, to convert a reg property to
a pci_dev_t.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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At present PCI auto-configuration happens in U-Boot both before and after
relocation. This is a waste of time and may mess up static addresses used
in board_init_f(). Adjust the code to supporting doing auto-configuration
once, after relocation, under control of a device-tree property.
This is needed for Apollo Lake for debugging the silicon-init code. Once
the UART is moved to a different MMIO address the debug UART does not work
and any debug output in Apollo Lake's arch_fsp_init_r() causes a hang.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Add a field to the PCI emulator per-device data which records which device
is being emulated. This is useful when the emulator needs to check the
device for something.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: rebase the patch against u-boot-x86/master to get it applied cleanly]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
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Fix these spelling errors the header file and documentation.
Fix a small typo in the PCI documentation.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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This function is useful in PCI emulators. More it into the header file to
avoid duplicating it in other drivers.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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This method is not used anymore since the bus/device/function of PCI
devices can be obtained from their (parent's per-child) platform data.
Drop it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Adds dm_pci_flr API that issues a Function Level reset on a PCI-e function,
if FLR is supported.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Makes dm_pci_map_bar API available for integrated PCI devices that
support Enhanced Allocation instead of the original PCI BAR mechanism.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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The comment now indicates that the input argument bar is a register offset,
not a BAR index.
It also mentions which BARs are supported for type 0/1 and that the
function can return 0 on error.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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This reverts commit aec4298ccb337106fd0115b91d846a022fdf301d.
Unfortunately this has a dramatic impact on the pre-relocation memory
used on x86 platforms (increasing it by 2KB) since it increases the
overhead for each PCI device from 220 bytes to 412 bytes.
The offending line is in UCLASS_DRIVER(pci):
.per_device_auto_alloc_size = sizeof(struct pci_controller),
This means that all PCI devices have the controller struct associated
with them. The solution is to move the regions[] member out of the array,
makes its size dynamic, or split UCLASS_PCI into controllers and
non-controllers, as the comment suggests.
For now, revert the commit to get things running again.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Various minor sandbox iumprovements
Fixes for tracing with sandbox
Refactoring for boot_get_fdt()
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